Meyer Lemon Losing Leaves: Spider Mites and Root Stress

A potted Meyer lemon with yellowing leaves (green veins), leaf drop, deformed new growth, and confirmed spider mites faces dual stress: pest pressure and probable root zone issues.

Spider Mite Management

Confirm: Tap leaves over white paper—tiny moving specks = mites. Webbing on leaf undersides confirms.

Treat:

• Insecticidal soap (thorough coverage, especially undersides)
• Strong water spray to physically dislodge mites
• Repeat weekly for 3-4 weeks
• Neem oil or horticultural oil as alternatives

Root Zone Investigation

Yellowing with green veins (interveinal chlorosis) in citrus usually means:

• Nutrient deficiency (iron, manganese, zinc) from high pH
• Root rot from overwatering/poor drainage
• Root-bound container (roots circling, no soil left)
• Salt buildup from fertilizer/water

Corrective Actions

1. Flush pot thoroughly monthly to leach salts
2. Repot if root-bound: trim circling roots, fresh citrus mix
3. Use acidic citrus fertilizer with micronutrients
4. Water only when top 2" dry; ensure drainage
5. Soil test through Extension office

Indoor citrus in Washington needs maximum light, humidity, and careful watering. Address both mites and roots for recovery.